Mold for building-blocks.



No. 768,668. v PATENTED AUG. 30, 1904.

' H. LOEWE & B. & L. VAN DAN ELZEN. I

MOLD FOR BUILDING BLOCKS.

APPLICATION FILED APR.1B. 1904. no MODEL. 2 SHEETS-SHEET 1.

IIIIIHII Altomey No. 768,668. PATENTED AUG. 30, 1904.

H. LOEWE 6: B. & L. VAN DAN ELZEN.

MOLD FOR BUILDING BLOCKS.

APPLICATION FILED ABE. 18.1904.

no MODEL. 2 SHBIETSSHEET 2.

W1 ru-vgss s;

z-lflorng/ UNITED STATES Patented August 30, 1904.

PATENT OFFICE.

HUGO LOEVVE, BARTHOLOMEW VAN DAN ELZEN, AND LOUIS VAN DAN ELZEN, OF EAST ST. LOUIS, ILLINOIS.

MOLD FOR BUILDING-BLOCKS.

SPECIFICATION forming part of Letters Patent No. 768,668, dated August 30, 1904.

Application filed April 18, 1904. Serial No. 203,641. (No model.)

To all whom it may concern:

Be it known that we, HUGO LOEWE, BAR- THOLOMEW VAN DAN ELZEN, and LOUIS VAN DAN ELZEN,of East St. Louis,St. Clair county, Illinois, have invented certain new and useful Improvements in Molds for Building-Blocks, of which the following is a specification.

Our invention relates to sectional and changeable molds for forming building'- blocks.

The objects of the invention are to provide a sectional mold which may be used in single sections or in a plurality of sections; to provide each mold in four sections hinged at their corners and separably keyed at the fourth corner; to provide two sides of one mold with laterally-projecting apertured ears to receive apertured lugs on an abutting mold-section, which lugs have wedges passed through them to key the whole together; to provide divisionplates constructed to separate the mold-sections and be held by said lugs and wedges; to provide the inner faces of the mold-sections with removable key-forming and tongue-andgroove-forming devices.

These and other objects are accomplished by the mechanism shown in the accompanying drawings, in which- Figure l is a perspective of one of the mold frames or sections. Fig. 2 is a side elevation of a series of the mold-frames arranged for a block of, say, five inches in thickness. Fig. 3 is a like view for a block, say, four inches thick. Fig. 4 is a plan of a partition-plate. Figs. 5 and 5 are plan and section of a bottom or end plate. Figs. 6,7,8,and 9 are detail views of members or sections of the molds or frames. Fig. 10 is a perspective of a block formed by our mold.

A designates a rectangular open mold section or frame formed of ends A A and sides A A*, all formed of metal plates. O O O are hinges connecting this sectional frame at three of its corners, while the fourth corner is connected by forming the end a of the section A with a slot at, through which the reduced end a of side A is passed, the end a having an aperture through which is passed a wedge D, which secures the parts firmly but separably together. Within the mold thus formed We 5 provide a removable bead or rib G to produce a corresponding groove around. a molded block.

Where the blocks are to be formed, as in Fig. 10, with seats or depressions to receive the ends of correspondingly-shaped blocks to form a ,key, we provide the key-forming plates EE, adapted to be secured to the inner faces of the mold sides A A by means of the screws H, and the inner faces of these plates E E are formed, respectively, with a rib G and a groove G to form a groove and tongue on the blocks. The sides A A and the plates E E are further provided with transverse apertures F to receive removable dowel-pins 5 F to form corresponding sockets in the blocks.

The sides A A* are provided with laterallyprojecting pairs of lugs B B B B, bolted thereto, as shown. The lugs B are at the lower edges of the sides and are provided 7 with slots 6, while the lugs B are at the upper edge of the sides and are provided with tongues 6, adapted to pass up through the slots Z) of the lugs B on a superposed frame or mold-section, as shown in Figs. 2 and 3. These tongues b are provided with slots t through which are passed the wedges D to hold the mold-frames together.

I designates a partition-plate of a size to cover a mold-frame completely, and this plate 0 has four lugs o', provided with slots t",through which the tongues Z) are passed. A similar plate 1 forms the bottom of a mold, but in lieu of the slots o" isprovided with slotted tongues 2' like the tongues Z), and held to 5 the lugs B of the bottom mold-sections by wedges D.

Where but a single block is to be formed, a single mold section or frame A is used, in which case the plate I forms the top and plate I the bottom of the mold. In case a block the thickness of two mold-sections is to be formed then two mold-sections are keyed together. \Vhere the mold isto be used for concrete or other materials requiring pressure. the single mold above described will be used.

In using the mold-frame for casting the frames are placed vertically in a mold-box, with their ends A uppermost and open. As soon as a mold-frame is filled its end A is swung down and closed by its wedge D. A number of molds will be placed face to face and secured, as shown in Figs. Qand 3. In practice as the rear mold-frame is removed a moldframewill be added at the front of the series and filled. 1n opening the mold-frame it is placed. on its plate A and the plates I are then re moved, and then the wedge D is removed and the frame unfolded away from the molded. block, which in about five minutes is sufiiciently strong to be self-sustaining in the drying-rack. Zefore removingthe wedges Dthe pins F, when used, are removed, so as not to break theblocks around the holes. The beads Gon the end plates A A are held in place by countersunk screws 9, so that they may be removed when it is desired to form the ends of the blocks plain, which will be the case with blocks whose ends are exposed at the corners of buildings or other structures.

By connecting a plurality of molds of varying depth it is possible to mold blocks of dif ferent thicknesses, as shown in Fig. 2, where a block, say, five inches thick maybe formed, while in Fig. 3 a block, say, four inches thick may be formed.

By this invention only two sets of individual molds are required to make various thicknesses of blocks, thereby cheapening the manufacture. As the key-plates E E are detachable, it will only be necessary to remove one of them to form a sill or floor or ceiling block, the screw-holes being filled to insure evenness. By removing both key-plates a rectangular block may be formed. The holes F allow pins F in mold to form holes in blocks for dowels or for inserting stiffeningrods during erecting of walls, &c. The wedges D are formed so that they may be used for fastening plates 1 1 to mold-frame or plates and frame to frame, the wedges being straight on one side and inclined at the side which engages the tongue-slots.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is-

1. A mold comprising a separable sectional frame and pairs of laterally-projecting lugs on the side pieces independent of the means for connecting the frame members together; the lugs next to one edge of the mold having openings or slots and the other lugs having slotted or apertured tongues.

2. A mold comprising a separable sectional frame and pairs of laterally-projecting lugs on the side pieces; the lugs next to one edge of the mold having apertures or slots and the lugs at the other edge having slotted tongues. a bottom plate having slotted tongues to pass through the slotted lugs and an opposite or partition plate having slots through which the first-named tongues may be passed and wedges for all of said slotted tongues.

3. A mold comprising a separable frame in hinged sections; one end of one side of the frame having a slot through which a slotted end of the adjacent end piece is passed, a wedge for said slotted end, apertured lugs on the lower portions of the sides of the mold, projecting slotted tongues on the upper portions of the sides of the mold, whereby a plurality of molds may be connected, plates of the same size as the molds and also having slots and tongues, for use with the slots and. tongues on the molds and wedges for said slotted tongues.

a. A sectional separable mold provided with front and back key-plates, one being tongued and the other grooved to form bonding ribs and grooves along the blocks, and means for securing said key-plates removably in place for simultaneous or separate use.

5. A sectional separable mold provided with front and back key-plates one being tongued and the other grooved to produce keys in the blocks having bonding ribs and grooves in their opposite faces.

6. A sectional separable mold provided with a rib around its interior to form a groove around the molded block, and key-forming plates between the ends of two of the mold sides and having tongued and grooved edges to form bonding ribs and grooves in the opposite edges of the block.

7. A sectional separable mold having a rib around its interior to form a groove around the block, key-forming plates between the ends of two of the mold sides or sections and having tongued and grooved edges to form bonding ribs and grooves in the opposite edges of blocks; said sides and key-plates having openings for dowel-pins to form sockets in the blocks.

8. A sectional, separable mold provided around its inner walls with a rib to form a groove around the molded block, and a keyforming plate secured to the inner face of one wall of the mold to form a seat in that edge of the block of a length to receive the keys formed at the abutting end portions of similarly-formed blocks.

9. A mold formed of a plurality of superposed, separable, hinged frames, the upper portions of one frame having slotted tongues and the lower portion of the next frame having slotted lugs, receiving said slotted tongues, wedges passed through the slotted tongues and shaped to force the frames closely together, partition-plates slotted for the pas- In testimony whereof We afliX our signatures I 0 1n presence of tWo Witnesses.

HUGO LOEWE. v BARTHOLOMEW VAN DAN ELZEN. LOUIS VAN DAN ELZEN.

l/Vitnesses:

GEO. D. PFEIFFENBERGER, E. A. SIEFERr, 

